Is there some VALID reason you persist in inundating us with this same
message??? You've asked your question and provided this followup 3
times now. This is the surest way to get yourself, and your
questions, ignored.

It is painfully obvious that COD1 contains NULL values; since we don't
know what sort of data this is, or what it represents, it's your task
to determine how to replace these NULLs with usable values.

Stop posting your output to the group; we have three copies of it and
that is two copies too many.